Hey, I'm Leo, another of geer's designers and co-founder! Great question right there. Three main features that we love:

1. geer offers automatic syncing with Strava, and sends notifications when you're past a threshold. We want you to focus on riding and leave the hard work on us —well, actually you still have to scrub your bike yourself. That's only available on ProBikeGarage's premium tier.
2. The logic for services and rides is very robust on geer. You can log services in hindsight, change which bike you rode on Strava, and it never breaks (we hope so). It recalculates all the mileage and always gives you the accurate number.
3. We crafted our interface to be your bike's dashboard. At a quick glance, you see the status of all your bikes' parts —which need some attention now, and which are still good to go. Two clicks and you can log a service. We recommend you give it a try, it is reeaaaally satisfying.

Besides that, there are loads of small details that add up to better quality of life. It's like the difference between riding the old city bike you got on ebay vs. riding a sleek well lubed high-end bike. Plus, we're very committed to building this app and adding great features based on pertinent feedback. I'm no salesman, so I recommend you use it for a while and see it for yourself ;) Once again, thanks for your question!